https://doi.org/10.1140/epjs/s11734-022-00446-4
Review
Composite dynamics and cosmology: inflation
1
Department of Physics, Faculty of Science, Khon Kaen University, 40002, Khon Kaen, Thailand
2
College of Graduate Studies, Walailak University, 80160, Nakhon Si Thammarat, Thailand
3
School of Science, Walailak University, 80160, Nakhon Si Thammarat, Thailand
4
Research Group in Applied, Computational and Theoretical Science (ACTS), Walailak University, 80160, Nakhon Si Thammarat, Thailand
Received:
6
October
2020
Accepted:
13
January
2022
Published online:
29
January
2022
Abstract
In this work, we review the composite dynamics in various models which can be efficiently used to study the mechanism of cosmic inflation. In the framework of single-field inflationary models, we consider the inflaton field emerging as a bound state stemming solely from the underlying fermionic degrees of freedom in various composite theories. Moreover, we constrain the number of e-foldings for composite models of inflation to obtain successful inflation and satisfy the observational data from Planck 2018, simultaneously. In addition, a set of cosmological parameters, e.g., the primordial spectral index 
and tensor-to-scalar ratio r, is constrained using the results reported by Planck 2018.
Special issue: Review of Fundamental Composite Dynamics. Guest editors: K. Sridhar, Giacomo Cacciapaglia, Aldo Deandrea.
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2022
